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Dynamic thermomechanical and tensile properties of chain‐extended poly(ethylene terephthalate)
Author(s) -
Bikiaris Demetris N.,
Karayannidis George P.
Publication year - 1998
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19981024)70:4<797::aid-app20>3.0.co;2-t
Subject(s) - differential scanning calorimetry , branching (polymer chemistry) , materials science , ultimate tensile strength , ethylene , poly ethylene , intrinsic viscosity , thermomechanical analysis , composite material , extender , polymer chemistry , dynamic mechanical analysis , polymer , chemistry , thermal expansion , thermodynamics , organic chemistry , polyurethane , physics , catalysis
A series of chemically modified poly(ethylene terephthalate) (PET) samples was received after chain extension of a virgin sample at different reaction times with a new diepoxide as chain extender. These samples showed different intrinsic viscosity and degrees of branching or crosslinking. The effect of this differentiation on thermal properties was studied by dynamic mechanical thermal analysis and the determined T g values were found to be in good agreement with those obtained by differential scanning calorimetry and thermomechanical analysis. Also, the branching or crosslinking exhibited significant improvement in tensile mechanical properties, which were studied, and the results are discussed. © 1998 John Wiley & Sons, Inc. J. Appl. Polym. Sci. 70: 797–803, 1998